Chlorination/Fe/Mn
What is the MCL for Chlorine
4mg/L or PPM
What is an aquifer?
underground layer of gravel, sand, sandstone, shattered rock, limestone, or other formation that holds water.
What is the name of the biological layer that forms on top of a slow sand filter?
the schmutzdecke
When was the SDWA passed?
December 1974
Should you throttle a hydrant?
NO
What is the chemical name of the liquid referred to as liquid bleach?
sodium hypochlorite
What % of the US is supplied by surface water?
About 75%
What are 2 common types of filter media?
sand, anthracite coal, GAC, garnet sand.
What does NTU stand for?
Nephelometric Turbidity Units
What PSI do you need to maintain for fire fighting with a hydrant?
minimum of 20 PSI
What is the test done to analyze chlorine?
DPD reagent method
Which water source is easier to pollute?
Surface water
what are 3 of the 4 types of gravity filters?
slow sand, rapid sand, high-rate, and deep-bed monomedium filters.
What does NTNC-PWS stand for?
Nontransient noncommunity public water supply
Besides fire fighting, what are the 4 other uses for a hydrant?
flushing water mains, flushing sewers, filling tank trucks for different jobs, or provide a temporary water source.
What are the SMCL's for Iron AND Manganese?
Iron=0.3mg/L or PPM
Manganese= 0.05mg/L or PPM
What does palatable mean?
Pleasing to the taste
Is filtration absorption or adsorption?
Adsorption. The particles are sticking to the surfaces of the media.
What does IESWTR stand for?
Interim Enhanced Surface Water Treatment Rule
What are the 2 categories of aerators?
Water to air, air to water
What are at least 3 ways to remove Iron and Manganese from the water?
Phosphate addition, ion exchange, filtration, oxidation with aeration, chlorination, or pot perm
List at least 4 parts of the water cycle
Evaporation, transpiration, advection, condensation, precipitation, interception, infiltration, subsurface flow, runoff, channel flow, storage, and snowmelt.
what rate do rapid sand filters filter at?
2gpm/ft2
What years was the SDWA ammended?
1986 and 1996
What are 5 chemicals removed by aeration?